sdk/pkg/front_end/test/spell_checking_utils_test.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'spell_checking_utils.dart';

void main() {
  expectSplit("Hello world", false, ["Hello", "world"], [0, 6]);
  expectSplit("Hello  world", false, ["Hello", "world"], [0, 7]);
  expectSplit("Hello\nworld", false, ["Hello", "world"], [0, 6]);
  expectSplit("Hello 'world'", false, ["Hello", "world"], [0, 7]);
  expectSplit("It's fun", false, ["It's", "fun"], [0, 5]);
  expectSplit("It's 'fun'", false, ["It's", "fun"], [0, 6]);
  expectSplit("exit-code", false, ["exit", "code"], [0, 5]);
  expectSplit("fatal=warning", false, ["fatal", "warning"], [0, 6]);
  expectSplit("vm|none", false, ["vm", "none"], [0, 3]);
  expectSplit("vm/none", false, ["vm", "none"], [0, 3]);
  expectSplit("vm,none", false, ["vm", "none"], [0, 3]);
  expectSplit(
    "One or more word(s)",
    false,
    ["One", "or", "more", "word(s)"],
    [0, 4, 7, 12],
  );
  expectSplit(
    "One or more words)",
    false,
    ["One", "or", "more", "words"],
    [0, 4, 7, 12],
  );
  expectSplit(
    "It's 'fun' times 100",
    false,
    ["It's", "fun", "times"],
    [0, 6, 11],
  );

  expectSplit("splitCamelCase", false, ["splitCamelCase"], [0]);
  expectSplit("splitCamelCase", true, ["split", "Camel", "Case"], [0, 5, 10]);
  expectSplit("logicalAnd_end", true, ["logical", "And", "end"], [0, 7, 11]);
  expectSplit("TheCNNAlso", true, ["The", "CNN", "Also"], [0, 3, 6]);
  expectSplit(
    "LOGICAL_OR_PRECEDENCE",
    true,
    ["LOGICAL", "OR", "PRECEDENCE"],
    [0, 8, 11],
  );

  expectSplit("ThisIsTheCNN", true, ["This", "Is", "The", "CNN"], [0, 4, 6, 9]);

  // Special-case "A".
  expectSplit("notAConstant", true, ["not", "A", "Constant"], [0, 3, 4]);
  expectSplit("notAC", true, ["not", "A", "C"], [0, 3, 4]);
  expectSplit("split_etc", false, ["split_etc"], [0]);
  expectSplit("split_etc", true, ["split", "etc"], [0, 6]);
  expectSplit("split:etc", false, ["split:etc"], [0]);
  expectSplit("split:etc", true, ["split", "etc"], [0, 6]);

  expectSplit("vm.none", false, ["vm.none"], [0]);
  expectSplit("vm.none", true, ["vm", "none"], [0, 3]);

  expectSplit(
    "ActualData(foo, bar)",
    false,
    ["ActualData(foo", "bar"],
    [0, 16],
  );
  expectSplit(
    "ActualData(foo, bar)",
    true,
    ["Actual", "Data", "foo", "bar"],
    [0, 6, 11, 16],
  );

  expectSplit("List<int>", false, ["List<int"], [0]);
  expectSplit("List<int>", true, ["List", "int"], [0, 5]);

  expectSplit(
    "Platform.environment['TERM']",
    false,
    ["Platform.environment['TERM"],
    [0],
  );
  expectSplit(
    "Platform.environment['TERM']",
    true,
    ["Platform", "environment", "TERM"],
    [0, 9, 22],
  );

  expectSplit("DART2JS_PLATFORM", false, ["DART2JS_PLATFORM"], [0]);
  expectSplit("DART2JS_PLATFORM", true, ["DART", "JS", "PLATFORM"], [0, 5, 8]);

  expectSplit("Foo\\n", false, ["Foo\\n"], [0]);
  expectSplit("Foo\\n", true, ["Foo"], [0]);

  expectSplit("foo({bar})", false, ["foo({bar"], [0]);
  expectSplit("foo({bar})", true, ["foo", "bar"], [0, 5]);

  expectSplit("foo@bar", false, ["foo@bar"], [0]);
  expectSplit("foo@bar", true, ["foo", "bar"], [0, 4]);

  expectSplit("foo#bar", false, ["foo#bar"], [0]);
  expectSplit("foo#bar", true, ["foo", "bar"], [0, 4]);

  expectSplit("foo&bar", false, ["foo&bar"], [0]);
  expectSplit("foo&bar", true, ["foo", "bar"], [0, 4]);

  expectSplit("foo?bar", false, ["foo?bar"], [0]);
  expectSplit("foo?bar", true, ["foo", "bar"], [0, 4]);

  expectSplit("foo%bar", false, ["foo%bar"], [0]);
  expectSplit("foo%bar", true, ["foo", "bar"], [0, 4]);

  expectSplit("foo42bar", false, ["foo42bar"], [0]);
  expectSplit("foo42bar", true, ["foo", "bar"], [0, 5]);

  expectSplit('foo"bar', false, ['foo"bar'], [0]);
  expectSplit('foo"bar', true, ["foo", "bar"], [0, 4]);

  expectAlternative(
    "explicitley",
    ["explicitly"],
    {"foo", "explicitly", "bar"},
  );
  expectAlternative("explicitlqqqqy", null, {"foo", "explicitly", "bar"});

  // Insert first letter.
  expectAlternative("ar", ["bar"], {"foo", "explicitly", "bar"});

  // Insert middle letter.
  expectAlternative("br", ["bar"], {"foo", "explicitly", "bar"});

  // Insert last letter.
  expectAlternative("ba", ["bar"], {"foo", "explicitly", "bar"});

  // Delete first letter.
  expectAlternative("xbar", ["bar"], {"foo", "explicitly", "bar"});

  // Delete middle letter.
  expectAlternative("bxar", ["bar"], {"foo", "explicitly", "bar"});

  // Delete last letter.
  expectAlternative("barx", ["bar"], {"foo", "explicitly", "bar"});

  // Replace first letter.
  expectAlternative("car", ["bar"], {"foo", "explicitly", "bar"});

  // Replace middle letter.
  expectAlternative("bcr", ["bar"], {"foo", "explicitly", "bar"});

  // Replace last letter.
  expectAlternative("bac", ["bar"], {"foo", "explicitly", "bar"});

  print("OK");
}

void expectSplit(
  String s,
  bool splitAsCode,
  List<String> expectedWords,
  List<int> expectedOffsets,
) {
  List<int> actualOffsets = <int>[];
  List<String> actualWords = splitStringIntoWords(
    s,
    actualOffsets,
    splitAsCode: splitAsCode,
  );
  compareLists(actualWords, expectedWords);
  compareLists(actualOffsets, expectedOffsets);
}

void compareLists(List<dynamic>? actual, List<dynamic>? expected) {
  if (actual == null && expected == null) return;
  if (actual == null) throw "Got null, expected $expected";
  if (expected == null) throw "Expected null, got $actual";
  if (actual.length != expected.length) {
    throw "Not the same ($actual vs $expected)";
  }
  for (int i = 0; i < actual.length; i++) {
    if (actual[i] != expected[i]) {
      throw "Not the same ($actual vs $expected)";
    }
  }
}

void expectAlternative(
  String word,
  List<String>? expected,
  Set<String> dictionary,
) {
  List<String>? alternatives = findAlternatives(word, [dictionary]);
  compareLists(alternatives, expected);
}